I'm going a little off the cuff, but I would like to see Marvel Studios ultimately reboot and lead to X-men: Age of Apocalypse. With the Fox contract running out, this is the only route I see this going. Singer basically using DoFP's plot to unwrite the mess X3 created. With that, characters are brought back to life, recast, put back in the same universe with others, and would lead strongly into Avengers 3: The Infinity Gauntlet.